b43: Fix controller restart crash
This fixes a kernel crash on rmmod, in the case where the controller was restarted before doing the rmmod. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -4271,7 +4271,9 @@ static void b43_chip_reset(struct work_struct *work)
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goto out;
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}
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}
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out:
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out:
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if (err)
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wl->current_dev = NULL; /* Failed to init the dev. */
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mutex_unlock(&wl->mutex);
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if (err)
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b43err(wl, "Controller restart FAILED\n");
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@ -4412,9 +4414,11 @@ static void b43_one_core_detach(struct ssb_device *dev)
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struct b43_wldev *wldev;
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struct b43_wl *wl;
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/* Do not cancel ieee80211-workqueue based work here.
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* See comment in b43_remove(). */
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wldev = ssb_get_drvdata(dev);
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wl = wldev->wl;
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cancel_work_sync(&wldev->restart_work);
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b43_debugfs_remove_device(wldev);
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b43_wireless_core_detach(wldev);
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list_del(&wldev->list);
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@ -4599,6 +4603,10 @@ static void b43_remove(struct ssb_device *dev)
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struct b43_wl *wl = ssb_get_devtypedata(dev);
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struct b43_wldev *wldev = ssb_get_drvdata(dev);
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/* We must cancel any work here before unregistering from ieee80211,
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* as the ieee80211 unreg will destroy the workqueue. */
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cancel_work_sync(&wldev->restart_work);
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B43_WARN_ON(!wl);
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if (wl->current_dev == wldev)
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ieee80211_unregister_hw(wl->hw);
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